Barcoding the Stars: How We Know What’s in Space
Sean Johnson tells us what stars are, how they got there, and what they are made of. For the last part of this story, Sean introduces the essential technique of spectroscopy, breaking the light of objects up into the colors of the rainbow to search for the fingerprints of specific chemical elements. Sean teaches us the fascinating physics of this process and then uses compelling demos so you can wrap your head around how it all works. Exciting!